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Thread: Copper Algaecide? What to do?

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    Join Date
    Jul 2014
    Location
    Belle River, Ontario, Canada
    Posts
    12

    Copper Algaecide? What to do?

    Hi everyone!

    Last season I came across this forum about mid way through summer and haven't looked back since. I already had a Taylor K-2006 test kit becaused I'm a bit of a nerd that way, but this site helped me feel confident about relying on my own test results and adding (or not adding) chemicals on my own without the pool store's blessing. So thank you all for that.

    I still use my pool builder to open and close my pool just because it's so much less of a hassle. This year I told them not to replace my DuoClear cartridge (I already took out the metal bag) but completely forgot that they typically add algaecide along with chlorine upon startup.

    Which brings me to my issue. I suspect they must have used a copper based algaecide. My spa spills over into the pool, and despite 1 week post opening, it is still foaming at the entry site. My Taylor test kit for CH suffers from a fading endpoint (never before did I have this problem).

    So... do I just let this go and hopefully work itself out over the next week or so? (Hopefully?) Throw in some metal sequestrant? Kind of a bummer since it's made the spa, the only reason I'd open the pool this early, essentially unusable. The amount of foam with the jets on high... kind of ridiculous.

    For completeness' sake, here are the rest of my numbers. Working on the borates and CYA. Water crystal clear aside from where it foams upon entry from the spa. Pretty consistent since opening.

    Salt - 3200 ppm
    FC - 4 ppm
    CC - 0
    pH - 7.5
    Alkalinity - 90 ppm
    Borates - 36 ppm
    CH - 200 ppm
    CYA - 35 ppm

    Thanks for your help!
    ~15500 gal (60000 L) IG Vinyl, built 2011. Spill-over Spa. SWG - Zodiac DuoClear. Hayward Super Pump 3/4 HP. Pentair Sta Rite Max-E-Pro Booster for Spa. Hayward Sand Filter. Raypak Heater.

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Copper Algaecide? What to do?

    Foaming is common with algaecides, but that doesn't mean it has to be copper-based. Is there some reason you can't call the pool guy and ask him what he put in? Then you'll know. And if it isn't copper, you won't need sequestrant, and chlorine will eventually oxidize the stuff away and end the foaming.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Copper Algaecide? What to do?

    The kinds of algaecide that foam do not have copper. The foaming will go away in roughly a week.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  4. Back To Top    #4

    Join Date
    Jul 2014
    Location
    Belle River, Ontario, Canada
    Posts
    12

    Re: Copper Algaecide? What to do?

    I've tried calling, but between working shifts and their still off-season hours, haven't managed to get ahold of them. Admittedly only tried twice (and again just now), but was calling really just to ask about when the foaming would stop. You're right though, probably shouldn't assume copper until I can get a definitive answer. Save me the cost of adding sequestrant. Perhaps the fading endpoint with the CH test is coming from something else. If I manage to get an answer I'll report back. Thanks for the reply.
    ~15500 gal (60000 L) IG Vinyl, built 2011. Spill-over Spa. SWG - Zodiac DuoClear. Hayward Super Pump 3/4 HP. Pentair Sta Rite Max-E-Pro Booster for Spa. Hayward Sand Filter. Raypak Heater.

  5. Back To Top    #5

    Join Date
    Mar 2015
    Location
    Georgia
    Posts
    157

    Re: Copper Algaecide? What to do?

    If the algaecide is what is causing the foaming then it would have to be Alkyl Dimethyl Benzyl Ammonium Chloride. ADBAC is an ammonium based quatanery algaecide and the chlorine will eventually break it down. They are terrible about foaming and leaving a black grease like skum in the skimmer but other than that no worries.
    16k AG Vinyl Sand Filter

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